The Town and Country Planning (General Permitted Development) Order 1995

[F1Development not permittedE+W

C.2.  Development consisting of the installation of apparatus is not permitted by Class C(a) on article 1(5) land unless—

(a)the land on which the apparatus is to be installed is, or forms part of, a site on which there is existing electronic communication apparatus;

(b)the existing apparatus was installed on the site on or before the relevant day; and

(c)the site was Crown land on the relevant day.]